Truck side frame



July 26, 1932. c. B. HARBISON 1,863,529

TRUCK SIDE FRAME Filed March 22, 1930 2 Sheets-Sheet 1 W .Z v a/6702604" L665 Qlarevwejaj' 00123116070 y 1932- c. B. HARBISON TRUCK SIDE FRAME Filed March 22. 1930 2 Sheets-Sheet 2 Patented July 26, 1932 UNITED STATES PATENT OFFICE CLARENCE B. HARRISON, OF LIMA, OHIO, ASSIGNOR TO THE OHIO' STEEL FOUNDRY COMPANY, OF LIMA, OHIO, A CORPORATION OF OHIO TRUCK SIDE FRAME Application filed March 22, 1930. Serial No. 438,012.

This inventionrelates to improvements in railway trucks of the type including a s1de frame and bolster, and has for its principal object to provide an improved construction of trucks of the character described, wherein room is provided for a relatively large number of springs between the bolster and the side frame, and improved bearing devices are also provided between the latter members. Other objects of the-invention will appear from time to time as thedescription proceeds.

The invention may best be understood by reference to the accompanying drawings, in which Figure 1 is a view of a truck constructed in accordance with my invention,

Figure 2 is a bottom view of the side frame and end portion of the bolster shown in Fig ure 1- Figure 3 is an enlar ed section taken on lines 33 of Figure 1, ut with the bolster and springs shown in side elevation; and

Figure 4 is an enlarged section taken on lines 44 of Figure 1.

Referring to details of the embodiment of my invention shown in the drawings, a truck side frame is indicated generally at and comprises a compression member 11, tension member 12, and vertical columns 13, 13. A bolster is indicated generally at 14, the end of which extends between the columns 13, 13. A spring plank is seated on the lower portion of the tension member 12 between the columns. A nest of coil springs indicated generally at 16, is interposed between the spring plank and the end of the bolster.

eferring now more particularly to the features of novelty forming the subject matter of this application, it will be observed that the nest of springs includes three springs 16a, 160:, 16a, arranged in alignment between the upright columns 13, 13. In order to provide proper bearing for these three springs on the bolster, the latter is formed with a pair of laterally extending projections 17, 17 extending the full height of the bolster and moving invertically disposed channels 18,,18 formed in the side walls of the columns 13, 13 adjacent their upper ends, each of said'channels being defined by a pair of vertically disposed lugs 19 and19a projecting toward the bolster from the inner and outer faces, respectively, of each of the columns 13.

The arrangement of the lateral projections 17 17in slots 18, 18 and the co-operating lugs 19 and 20 of the side frame columns and bolster, respectively, are best shown in the horizontal sectional view in Figure 4; the lugs 19 extending only half way to thebottom of the columns 13, 13 so as to permit the bolster to be drop ed below said lugs and withdrawn lateral y from the side frame when the springs 16 and 160 are removed.

The bolster is also provided with two pairs of lugs 20, 20 and 20a, 20a on each side thereof, the outer air of which (nearest the end of the bolsterlengages the outer faces of the upright lugs 19, 19 on the side frame, and the inner pair of which engages the inner faces of the lugs 19a, 19a.

It will be especially observed that the cooperating surfaces of lugs 19 and 20 and of channels 18, 18 so as to urge the car in the direction of motion. The endwise bearin stresses exerted in the direction of motion 0 the car are, therefore, taken up by the relatively wide front and rear faces of the projections 1-7, 17 of the bolster, where they engage in the bottoms of channels 18, 18 of the upright columns 13, but the lateral bearing stresses of the bolster are taken up by the lugs 20 'and 20a of the bolster where they engage the lugs 19 and 19a of the columns. With the construction just described, it will now be understood that when wear takes place due to the lateral bearing engagement etween lugs 19 and 20, or lugs 19a and 20a, these lugs are much morev readily accessible for repair, as for instance, by building them up by the welding process than would be possible if the lateral wear were taken up directly by engagement of the projections 17,17 with the inside of lugs 19 and 19a. f

While I have illustrated and described 6 the particular embodiment of my invention,

it will be understood-that I donot wish to be limited to the exact construction shown and described, but that various changes and modifications may be made without depart- 10 ing from the spirit and scope of my invention.

I claim: 1; In a truck, a side frame including-a pair of upright columns, each having ver- 5 tical channels formed in their opposite faces, a

a bolster extending between said columns and having a pair of projections fitting in said channels, a plurality of coil springs supporting said bolster, including two end springs,

each of which is in partial supporting position beneath its respective projection, and a pair of lugs on said bolster spaced from said proj'ections'and engaging an exterior face of said columns to restrain relative lateral movement of said bolster'and said side frame.

2. In a truck, a side frame including apair of upright columns, each having vertical channels formed in their opposite faces;

a bolster extending between said columns and .having a pair of projections fitting ,in said channels, a plurality of coil springs supporting said bolster, including two end springs, each of which is in partial supporting position beneath its respective projection, and

two pairs of lugs on said bolster spaced from I said projections and respectively engaging the inner and orter faces of said columns to restrain relatlve lateralmoVement of s id 40 bolster and said side frame'independently said projections. A

3. In a truck, a side frame including a pair of, upright columns, each having vertical channels formed in their opposite faces, a bolster extending between said columns and having a pair of projectionsfitting insaid channels, a 1plurality of coil springs supporting said bo ster, including two end springs, each of which is in partial supporting posi-' tion beneath its respective projection,'two' pairs of lugs on said bolster spaced from said projections and engaging respectively the inner and outer faces of said columns to restrain relative lateral movement of said bolster and said side frame, said projections having endwise bearing engagement in their respective channels in the direction of motion of the car, but having clearance between the sides of said channels whereby substantially all the lateral thrust is borne by said lugs and exterior faces of said columns, as aforesaid.

Signed at Lima, Ohio, this 18th day of March, 1930. CLARENCE B. HARBISON. 

